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Contractor license records in Ontario, CA
918 records with Ontario as their locality of record in CSLB's records, as of November 3, 2026. Statuses print as the board records them; a record listed as suspended is not a current credential.
Source: California Contractors State License Board (CSLB) — records as of November 3, 2026. Records change; the board’s own CSLB License Check is the current source.
By classification in Ontario
General Building (338) · Electrical (137) · General Engineering (61) · Warm-Air Heating, Ventilating and Air-Conditioning (51) · Painting and Decorating (50) · Plumbing (49) · Low Voltage Systems (36) · Landscaping (34) · Concrete (32) · Flooring and Floor Covering (32) · Roofing (26) · Cabinet, Millwork and Finish Carpentry (22) · Doors, Gates and Activating Devices (22) · Glazing (21) · Drywall (20) · Ceramic and Mosaic Tile (18) · Synthetic Products (17) · Swimming Pool (16) · Masonry (16) · Structural Steel (13) · Fire Protection (12) · Refrigeration (12) · Building Moving/Demolition (12) · Pool and Spa Maintenance (11) · Window Coverings (9) · Sanitation System (9) · Prefabricated Equipment (9) · Lathing and Plastering (9) · Earthwork and Paving (8) · Metal Products (8) · Parking and Highway Improvement (7) · Sign (7) · Reinforcing Steel (7) · Machinery and Pumps (7) · Concrete-Related Services (7) · Hazardous Substance Removal Certification (6) · Ornamental Metal (6) · Fencing (5) · Service Station Equipment and Maintenance (5) · Sheet Metal (5) · Welding (5) · Framing and Rough Carpentry (4) · Construction Cleanup (4) · Tree Service (4) · Residential Remodeling (4) · Non-Electrical Sign Installation (3) · Solar (3) · Non-specialized (3) · Asbestos Certification (3) · Asbestos Abatement (3) · Tree and Palm (3) · Paperhanging (2) · Awnings (2) · Construction Zone Traffic Control (2) · Boiler, Hot-Water Heating and Steam Fitting (2) · Pipeline (2) · Insulation and Acoustical (2) · General Manufactured Housing (1) · Suspended Ceilings (1) · Well Drilling (1) · Lock and Security Equipment (1) · Hardware, Locks and Safes (1) · Safes and Vaults (1) · Siding and Decking (1) · Scaffolding (1)
- CANSECO ELECTRICAL CONTRACTING INCORPORATED CLEAR
- CAP ANGELES CONSTRUCTION INC CLEAR
- CARDIN CONSTRUCTION Contr Bond Susp
- CARLYLE GLASGOW WELDING SERVICES CLEAR
- CASH GRADING CONTRACTORS INC CLEAR
- CASTILLON FLOORING CONTRACTOR CLEAR
- CASTLE CONSTRUCTION AND DEVELOPMENT INC CLEAR
- CASTLE CONTRACTOR Contr Bond Susp
- CBX CONSTRUCTION INC CLEAR
- CDN CONSTRUCTION CLEAR
- CEILING MASTER LLC CLEAR
- CESARS POOL REPAIRS CLEAR
- CGO CONSTRUCTION COMPANY INC CLEAR
- CHAVA'S MARBLE & TILE CLEAR
- CHINO VALLEY REFRIGERATION CLEAR
- CHIRCO CONSTRUCTION GROUP LLC CLEAR
- CHOICE BUILDER SOLUTIONS LLC CLEAR
- CHOICE PAINTING CO CLEAR
- CHRISTOPHER ARVIZU CLEAR
- CHUN LI CLEAR
- CJ CONSTRUCTION SERVICES CLEAR
- CLARA VERONICA ALATORRE CLEAR
- CLASSIC KITCHENS ETC INC DBA JOHN I ADAMS CONSTRUCTION CLEAR
- CLEAN POWER CONSTRUCTION CLEAR
- CLEARVIEW POOLS INC CLEAR
- CM CUSTOM PAINT AND STAIN CLEAR
- CMD ELECTRIC INC CLEAR
- COASTLINE OUTDOOR SOLUTIONS Contr Bond Susp
- COMMERCIAL CONCRETE CONSTRUCTORS INC CLEAR
- COMPLETE POOL SERVICES CLEAR
- COMTRACT COMMUNICATIONS INC CLEAR
- CONCRETE PROTECTION SYSTEMS WEST INC CLEAR
- CONSTRU ONE INC CLEAR
- CONSTRUX WEST INC CLEAR
- CONTROL SYSTEMS CLEAR
- COPPERHEAD ELECTRIC CLEAR
- CORNERSTONE CARPENTRY Contr Bond Susp
- CORREA CONSTRUCTION CLEAR
- COVA CONSTRUCTION INC CLEAR
- COX COMMERICAL & INDUSTRIAL INC CLEAR
- CPC CUSTOM PAINTING CORPORATION CLEAR
- CPL CONSTRUCTION INC CLEAR
- CRAIG E HOLBROOK CLEAR
- CRISTIAN EUCEDA CLEAR
- CROWN COMMUNICATIONS ENGINEERING INC CLEAR
- CROWN CONSTRUCTION GROUP INC CLEAR
- CRUZ CUSTOM WOODWORKS INC CLEAR
- CUSTOM BRICK & BLOCK MASONRY CLEAR
- CUSTOM CARPENTRY CLEAR
- CUSTOM CONSTRUCTION CLEAR
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